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Engines & Engine Parts
Welcome to your headquarters for horsepower—the place to get everything you need to build real power and performance! We’ve got competition-proven crate engines, performance-matched...
Welcome to your headquarters for horsepower—the place to get everything you need to build real power and performance! We’ve got competition-proven crate engines, performance-matched top end kits, and complete rotating assemblies from the biggest names in the industry. You can add a set of high-flow cylinder heads to your powerplant, upgrade your valvetrain, improve your oiling system, or drop in a new set of pistons. We also have a complete selection of crankshafts, connecting rods, harmonic balancers, pulleys, and engine brackets. We even have everything you need to restore the horsepower that time has stolen from your...
Welcome to your headquarters for horsepower—the place to get everything you need to build real power and performance! We’ve got competition-proven crate engines, performance-matched top end kits, and complete rotating assemblies from the biggest names in the industry. You can add a set of high-flow cylinder heads to your powerplant, upgrade your valvetrain, improve your oiling system, or drop in a new set of pistons. We also have a complete selection of crankshafts, connecting rods, harmonic balancers, pulleys, and engine brackets. We even have everything you need to restore the horsepower that time has stolen from your daily driver.
Valve Springs, Dual, 0.415 in. Maximum Lift, Harley-Davidson®, Set of 4
Part Number: KPM-20-20432
Estimated Ship Date: Tomorrow if ordered today
Estimated Ship Date: Tomorrow if ordered today
COMPETITION ASSEMBLY CHRYSLER 360
Part Number: ESP-20204080
Not Yet Reviewed
Estimated Ship Date: Apr 24, 2026 if ordered today
Estimated Ship Date: Apr 24, 2026 if ordered today
732 035850 0240 123 RING
Part Number: HSN-20204
Not Yet Reviewed
Estimated Ship Date: Apr 20, 2026 if ordered today
Estimated Ship Date: Apr 20, 2026 if ordered today
Valve Spring Retainers, Steel, Harley-Davidson®, Set of 4
Part Number: KPM-20-20441
Not Yet Reviewed
Estimated Ship Date: Tomorrow if ordered today
Estimated Ship Date: Tomorrow if ordered today
126 040850 0620 186 CAST COMP
Part Number: TSR-202047
Not Yet Reviewed
Estimated Ship Date: Apr 15, 2026 if ordered today
Estimated Ship Date: Apr 15, 2026 if ordered today
Valve Springs, Lightweight Racing, Dual, Steel Retainers, Steel Locks, Harley-Davidson®, Kit
Part Number: KPM-20-20450
Not Yet Reviewed
Estimated Ship Date: Today
Estimated Ship Date: Today
Cylinder Head Studs, 8740 Chromoly, Black Anodized, Harley-Davidson®, Set of 8
Part Number: KPM-20-20412
Not Yet Reviewed
Estimated Ship Date: Apr 14, 2026 if ordered today
Estimated Ship Date: Apr 14, 2026 if ordered today
Valve Locks, Keepers, Machined, Hardened Steel, Natural, Harley-Davidson®, Set of 4
Part Number: KPM-20-20434
Not Yet Reviewed
Estimated Ship Date: Apr 15, 2026 if ordered today
Estimated Ship Date: Apr 15, 2026 if ordered today
Keeper(s), OEM Replacement, H.T. Steel, In/Ex, Harley-Davidson®, Knucklehead, 1936-'47
Part Number: KPM-20-20429
Not Yet Reviewed
Estimated Ship Date: Apr 14, 2026 if ordered today
Estimated Ship Date: Apr 14, 2026 if ordered today
Valve Springs, Dual, 0.415 in. Maximum Lift, Harley-Davidson®, Set of 4
Part Number: KPM-20-20437
Not Yet Reviewed
Estimated Ship Date: Tomorrow if ordered today
Estimated Ship Date: Tomorrow if ordered today
Valve Spring Locators, Lower Collars, Heat-treated, Steel, Harley-Davidson®, Set of 4
Part Number: KPM-20-20428
Not Yet Reviewed
Estimated Ship Date: Tomorrow if ordered today
Estimated Ship Date: Tomorrow if ordered today
126 040875 0775 186 CAST COMP
Part Number: TSR-202049
Not Yet Reviewed
Estimated Ship Date: Apr 15, 2026 if ordered today
Estimated Ship Date: Apr 15, 2026 if ordered today
126 040800 0775 186 CAST COMP
Part Number: TSR-202041
Not Yet Reviewed
Estimated Ship Date: Apr 15, 2026 if ordered today
Estimated Ship Date: Apr 15, 2026 if ordered today
Valve Springs, OEM Replacement, Single, Retainers, Locks, Harley-Davidson®, Kit
Part Number: KPM-20-20480
Not Yet Reviewed
Estimated Ship Date: Apr 15, 2026 if ordered today
Estimated Ship Date: Apr 15, 2026 if ordered today
Valve Spring Shims, Hardened, 0.265 in. Height, Harley-Davidson®, Set of 4
Part Number: KPM-20-20487
Not Yet Reviewed
Estimated Ship Date: Apr 15, 2026 if ordered today
Estimated Ship Date: Apr 15, 2026 if ordered today
Valve Spring Retainers, Steel, Harley-Davidson®, Set of 4
Part Number: KPM-20-20431
Not Yet Reviewed
Estimated Ship Date: Tomorrow if ordered today
Estimated Ship Date: Tomorrow if ordered today
Valve Springs, Single, Standard Style, Chrome Silicon, Harley-Davidson®, Set of 4
Part Number: KPM-20-20483
Not Yet Reviewed
Estimated Ship Date: Apr 15, 2026 if ordered today
Estimated Ship Date: Apr 15, 2026 if ordered today
Valve Springs, OEM Replacement, Dual, Steel Retainers, Steel Locks, Harley-Davidson®, Kit
Part Number: KPM-20-20440
Not Yet Reviewed
Estimated Ship Date: Tomorrow if ordered today
Estimated Ship Date: Tomorrow if ordered today
Retainer, OEM Replacement, H.T. Steel, In/Ex, Harley-Davidson®, Knucklehead, 1936-'47
Part Number: KPM-20-20426
Not Yet Reviewed
Estimated Ship Date: Apr 15, 2026 if ordered today
Estimated Ship Date: Apr 15, 2026 if ordered today
COMPETITION ASSEMBLY CHRYSLER 360
Part Number: ESP-20204060
Not Yet Reviewed
Estimated Ship Date: Apr 24, 2026 if ordered today
Estimated Ship Date: Apr 24, 2026 if ordered today
Valve Spring Locators, Lower Collars, Heat-treated, Steel, Harley-Davidson®, Set of 4
Part Number: KPM-20-20438
Not Yet Reviewed
Estimated Ship Date: Tomorrow if ordered today
Estimated Ship Date: Tomorrow if ordered today
Valve Spring Locators, Lower Collars, Heat-treated, Steel, Harley-Davidson®, Set of 4
Part Number: KPM-20-20485
Not Yet Reviewed
Estimated Ship Date: Tomorrow if ordered today
Estimated Ship Date: Tomorrow if ordered today
Valve Locks, Keepers, Machined, Hardened Steel, Natural, Harley-Davidson®, Set of 4
Part Number: KPM-20-20489
Not Yet Reviewed
Estimated Ship Date: Tomorrow if ordered today
Estimated Ship Date: Tomorrow if ordered today
COMPETITION ASSEMBLY CHRYSLER 360
Part Number: ESP-20204040
Not Yet Reviewed
Estimated Ship Date: Apr 24, 2026 if ordered today
Estimated Ship Date: Apr 24, 2026 if ordered today
126 040800 0620 186 CAST COMP
Part Number: TSR-202040
Not Yet Reviewed
Estimated Ship Date: Apr 14, 2026 if ordered today
Estimated Ship Date: Apr 14, 2026 if ordered today
